the road a little bit. >> go braves. go ahead. >> during wednesday's debate, mitt romney defended his tax plan, rejecting president obama's claim that the plan would ultimately raise the tax burden on the middle class by eliminating some tax deductions. the romney campaign has released an ad, claiming it's the president who would increase taxes on the middle class. take a look. >> who will raise taxes on the middle class? according to an independent nonpartisan study, barack obama and the liberals will raise taxes on the middle class by $4,000. the same organization says the plan for mitt romney and common-sense conservatives is not a tax hike on the middle class. want proof? read the nonpartisan study for yourself at american.com. obama and his liberal allies, we can't afford four more years. >> i'm mitt romney and i approved this message. >> okay. and yesterday while in council bluffs, iowa, vice president joe biden shot back agreeing the obama plan would raise taxes, just not on the middle class. >> on top of the trillion dollars of spending we've already cut, we're going to ask, yes.